A method to estimate the yield surface of porous metals, by identifying
evolution of local yield connectivity and the onset of local yield percolation
across the microstructure from finite element analyses, is investigated The
finite element analyses are used to model the types of pore morphologies that
have been observed in porous metals. Linear superposition of basis deformation
cases is used to generate arbitrary applied elastic biaxial deformation states
used to estimate the yield surface, in place of more costly and time consuming
nonlinear analyses. &
Introduction
Macroscopic plastic flow is a